Problem with Word for Mac!

I just got word for Mac and am having a terrible time with some weird spacing thing I can't fix. I have the lines on x1.0 spacing, but for some reason they're being spaced 1.5! Each line is really wide. I've attached a photo to help explain:

It's probably paragraph spacing, which I have to deal with constantly (blast you Mendeley!). Highlight the content > Right click the content > Paragraph... > Spacing > make sure "Before" and "After" are both set to 0.

Van is right on with this one. I have to deal with that all the time and quite frankly, it's a royal pain. I run into this quite often when cutting and pasting from on line sources or other documents. Sometimes I spend more time re-formatting a document than actually typing it out. By the way, this isn't limited to Word, other WP programs act the same way.